A5020482966- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Laser-Matter Interactions and Applications
- Laser Design and Applications
- Nonlinear Optical Materials Studies
- Nanofabrication and Lithography Techniques
- Photonic Crystal and Fiber Optics
- Photonic and Optical Devices
- Advanced Optical Sensing Technologies
- Quantum optics and atomic interactions
- Laser Material Processing Techniques
- Laser-Plasma Interactions and Diagnostics
- Ocular and Laser Science Research
- Semiconductor Lasers and Optical Devices
- Advanced optical system design
- Spectroscopy and Laser Applications
- Optical Systems and Laser Technology
- Advanced Fiber Optic Sensors
- Photochromic and Fluorescence Chemistry
- Silicon Carbide Semiconductor Technologies
- Optical measurement and interference techniques
- Semiconductor materials and devices
- Advanced Fluorescence Microscopy Techniques
- Laser-induced spectroscopy and plasma
Xi'an Jiaotong University
2025
Nanjing University of Science and Technology
2025
Xiamen University
2025
Korea Advanced Institute of Science and Technology
2014-2024
Texas A&M University
2023-2024
Indian Institute of Technology Madras
2023-2024
University of Bergamo
2023-2024
Advisory Board Company (United States)
2021-2024
John Wiley & Sons (United States)
2016-2024
Hudson Institute
2016-2024
To achieve sustainable utilization of solar energy, development an efficient photocatalyst for water oxidation, the driving force reductive fuel formation, is strongly needed. Herein, composite photocatalysts with bismuth vanadate (BiVO4) and sulfur-doped graphitic carbon nitride (SCN) are developed by using a one-pot impregnated precipitation method. Fourier transform infrared X-ray photoelectron spectroscopy analyses demonstrate that surface SCN oxidized during impregnation becomes...
In this study, we report a neo-conceptive three-dimensionally (3D) crossing manifold micromixer (CMM) embedded in microchannel. Fabricated by sequential processes of photolithography and two photon absorption stereolithography, leads to microfluidic system with built-in site controlled manner. The effectiveness CMM is investigated numerically experimentally. Through the numerical simulation, it estimated that high mixing ratio 90% can be obtained even channel length shorter than five times...
The degradation rates of hydrogels are shown to be regulated by the modulation dissociation polymer chains via a size mismatch in crosslinking zones. This method (used control degradation) can exploited order engineer cartilage tissue vivo (see Figure).
We report on a high-power diode–end–pumped polycrystalline Yb:Y2O3 ceramic laser. Under the pump power of 27W, continuous-wave output 9.2W at 1078nm has been obtained by using an coupler R=96%. The laser had threshold 3.1W and slope efficiency 41%. Comparative studies performance between Yb:yttrium aluminum garnet (YAG) single crystal show that same doping concentration 8at.%, higher can be in than Yb:YAG
In this paper, we propose a new method that is capable of obtaining clear 3D image by the reduction false alarms caused noise in stage acquisition raw time flight (TOF) data. This implemented intensity dividing laser-return pulse into two Geiger-mode avalanche photodiodes (GmAPDs); an AND gate compares arrival electrical signals from GmAPDs. Despite fact energy decreased half, alarm probability drastically because distributed randomly domain filtered out. The experimental measurement...
We developed the laser oxyfuel and oxyflame hybrid (LOXAFH) cutting method which has potential to break limit by integrating methods. The LOXAFH was designed through numerical simulation, verified clad plate experiments. Furthermore, influence of heat sources composed 1 kW beams, oxygen jet flow, flame contribute melting analyzed. Controlling factors such as input, preheating flame, flow were found be crucial in achieving optimal results. nozzle shape, particularly converging-diverging...
A simultaneous volumetric thickness-profile measurement method based on an acousto-optic tunable filter for transparent film deposited upon pattern structures is described. The nondestructive thickness profilometer prevents the destruction of samples such as one encounters in using a scanning-electron microscope and provides good accuracy. information profile obtained through least-squares fitting with phase model, ø(model)(k)=2kh+? (k, d)+(offset) , which has three unknowns: surface h, d,...
A subregional slicing method (SSM) is proposed to increase the nanofabrication efficiency of a nanostereolithography (NSL) process based on two-photon polymerization (TPP). The NSL can be used fabricate three-dimensional (3D) microstructures via accumulation layers uniform thickness; hence, precision final 3D microstructure depends layer thickness. use thickness means that, precise microstructure, large number thin slices inevitably required, leading long processing times. In SSM here,...
We report a high-efficiency diode-end-pumped polycrystalline Yb:Y2O3 ceramic laser. Pumped by 976 nm laser diode bar and with an absorbed pump power of 2.8 W, cw output 1.74 W at 1078 nm, 0.73 1040 were obtained. The slope efficiency was measured to be 82.4% for the emission 57.1% emission.
In this paper, to obtain high strength and plasticity titanium alloy, a (Ti 78 Fe 22 ) 89 Nb 9 Y 2 alloy was synthesized tailored by semi-solid isothermal processing (SSIP). The experiment revealed that during the treatment process, microstructure of progressively transformed from dendritic spherical crystals as temperature holding time increased. This transformation accompanied dissolution fine precipitates into matrix. As result, composed bimodal micro-spherical/ultrafine lamellar...
We report on a diode-pumped polycrystalline Yb:Y2O3 ceramic laser. demonstrate that, with pump power of 11 W at 937 nm, 0.75-W cw laser output 1078 nm can be obtained from the The had threshold 4.7 and slope efficiency 12.6% when an coupler R=98% was used.
Silicon carbide has been used to fabricate a variety of short wavelength optoelectronic devices including blue LEDs, green LEDs and UV photodiodes. As light emitter, 6H-SiC junctions can be tailored emit across the visible spectrum. The most widely commercialized device is LED. Over past years, quantum efficiency Cree Research LED increased significantly. with peak 470 nm spectral halfwidth ≈︂70 nm. optical power output typically between 25 35 μW at forward current 20 mA 3.2 V. This...
Ultraprecise fabrication of three-dimensional (3D) microstructures comes up to be one the most important issues in two-photon induced photopolymerization. To date, it has been difficult fabricate 3D without any deformation due surface tension between a rinsing material and solidified during developing process: In general, significantly affects precision resulting microstructures. overcome this problem, authors propose simple effective laser scanning method reinforce strength loss precision....
The Cascaded Multi-Dithering theory, which allows coherent beam combining of M-by-N elements, is presented in this paper. theory briefly introduced, and demonstrated experimentally by sixteen-beams to verify its feasibility as an active phase control for scaling up the power fiber lasers.
We present the dual phase photocatalysts enabling 3-fold longer charge carrier lifetime and enhanced photocatalytic water oxidation by integrating a tetragonal zircon-type BiVO<sub>4</sub> as an electron mediator for <italic>Z</italic>-scheme transfer.
In this paper, a photon-counting three-dimensional imaging laser detection and ranging (LADAR) system that uses Geiger-mode avalanche photodiode (GAPD) of relatively short dead time (45 ns) is described. A passively Q-switched microchip used as source compact peripheral component interconnect system, which includes time-to-digital converter (TDC), set up for fast signal processing. The combination GAPD with TDC multistop function enables the to operate in single-hit or multihit mode during...
An innovative flash LIDAR (light detection and ranging) system with high spatial resolution range precision is proposed in this paper. The consists of a polarization modulating Pockels cell (PMPC) micro-polarizer CCD camera (MCCD). changes its state respect to time after laser pulse emitted from the system. laser-return depends on arrival time. MCCD measures intensity returning calculate state, which gives range. A 0.12 mrad 5.2 mm at 16 m were obtained, respectively, experiment.
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text Sang Whoe Dho, Young Je Park, and Hong Jin Kong, "Experimental determination of a geometric form factor in lidar equation for an inhomogeneous atmosphere," Appl. Opt. 36, 6009-6010 (1997) Export BibTex Endnote (RIS) HTML Plain alert Save article
We report on an efficient diode-end-pumped polycrystalline Yb:Y2O3 ceramic laser. Continuous-wave output power of 4.2 W at 1078 nm was obtained under pump 19.5 W. The corresponding slope efficiency 29%. beam quality factor M2 full measured to be 1.63. threshold wavelengths the laser various couplings were also investigated. It found that shifted ∼5 when reflectivity coupler changed from 90% 99.9%, as caused by strong reabsorption effect in sample.